Across
- 4. chemicals used in coolants, solvents, and aerosol cans that damage the ozone layer
- 5. all the plants and trees in an area
- 8. layer of Earth's atmosphere closest to Earth's surface (where weather takes place and where most pollution occurs)
- 10. The layer of the atmosphere where space shuttles orbit
- 11. The outer layer of the thermosphere, extending outward into space.
- 13. A line on a weather map that joins places that have the same air pressure
Down
- 1. permanently frozen layer of soil beneath the surface of the ground
- 2. something different from the norm
- 3. caused by human activities
- 4. The average weather conditions in an area over a long period of time.
- 6. The condition of Earth's atmosphere at a particular time and place.
- 7. A description of surface features of land.
- 9. A gas produced both through natural sources and human activities, including the decomposition of wastes in landfills, agriculture, and especially rice cultivation, as well as digestion and manure management
- 12. a gas molecule that is made up of three oxygen atoms